diff --git a/interfaces/interfaces.vcxproj b/interfaces/interfaces.vcxproj
index 994f27bc..7301fef8 100644
--- a/interfaces/interfaces.vcxproj
+++ b/interfaces/interfaces.vcxproj
@@ -57,7 +57,7 @@
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-      <PreprocessorDefinitions>WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;_DEBUG;DEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_HAS_ITERATOR_DEBUGGING=0;_ALLOW_RUNTIME_LIBRARY_MISMATCH;_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH;_ALLOW_MSC_VER_MISMATCH;WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;_DEBUG;DEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <MinimalRebuild>true</MinimalRebuild>
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@@ -115,7 +115,7 @@
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       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <AdditionalIncludeDirectories>..\public;..\public\tier0;..\public\tier1;..\public\interfaces;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;NDEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_HAS_ITERATOR_DEBUGGING=0;_ALLOW_RUNTIME_LIBRARY_MISMATCH;_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH;_ALLOW_MSC_VER_MISMATCH;WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;NDEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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diff --git a/mathlib/mathlib.vcxproj b/mathlib/mathlib.vcxproj
index 90360ae1..fbd73ad0 100644
--- a/mathlib/mathlib.vcxproj
+++ b/mathlib/mathlib.vcxproj
@@ -56,7 +56,7 @@
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       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>..\public;..\public\tier0;..\public\tier1;..\public\mathlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;_DEBUG;DEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_HAS_ITERATOR_DEBUGGING=0;_ALLOW_RUNTIME_LIBRARY_MISMATCH;_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH;_ALLOW_MSC_VER_MISMATCH;WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;_DEBUG;DEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <MinimalRebuild>true</MinimalRebuild>
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@@ -113,7 +113,7 @@
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       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <AdditionalIncludeDirectories>..\public;..\public\tier0;..\public\tier1;..\public\mathlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;NDEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_HAS_ITERATOR_DEBUGGING=0;_ALLOW_RUNTIME_LIBRARY_MISMATCH;_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH;_ALLOW_MSC_VER_MISMATCH;WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;NDEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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diff --git a/tier1/tier1.vcxproj b/tier1/tier1.vcxproj
index a1687450..b992757b 100644
--- a/tier1/tier1.vcxproj
+++ b/tier1/tier1.vcxproj
@@ -57,7 +57,7 @@
     <ClCompile>
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       <AdditionalIncludeDirectories>..\public;..\public\tier0;..\public\tier1;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_WIN32;VEL': value '0' doesn't match value '2' in core_metamod.obj;COMPILER_MSVC;COMPILER_MSVC32;_DEBUG;DEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_HAS_ITERATOR_DEBUGGING=0;_ALLOW_RUNTIME_LIBRARY_MISMATCH;_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH;_ALLOW_MSC_VER_MISMATCH;WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;_DEBUG;DEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <MinimalRebuild>true</MinimalRebuild>
       <ExceptionHandling>
@@ -114,7 +114,7 @@
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       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <AdditionalIncludeDirectories>..\public;..\public\tier0;..\public\tier1;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;NDEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_HAS_ITERATOR_DEBUGGING=0;_ALLOW_RUNTIME_LIBRARY_MISMATCH;_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH;_ALLOW_MSC_VER_MISMATCH;WIN32;_WIN32;COMPILER_MSVC;COMPILER_MSVC32;NDEBUG;_LIB;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;TIER1_STATIC_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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